<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Switch</title>
    <style>
        * {
	border: 0;
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}
:root {
	--hue: 223;
	--bg: hsl(var(--hue),10%,90%);
	--fg: hsl(var(--hue),10%,10%);
	--primary: hsl(var(--hue),90%,50%);
	--primary-t: hsla(var(--hue),90%,50%,0);
	--unchecked: hsl(var(--hue),10%,70%);
	--checked: hsl(133,70%,40%);
	--trans-dur: 0.4s;
	--trans-timing1: cubic-bezier(0.65,0,0.35,1);
	--trans-timing2: cubic-bezier(0.68,-0.6,0.32,1.6);
	font-size: calc(40px + (80 - 40) * (100vw - 320px) / (2560 - 320));
}
body,
input {
	color: var(--fg);
	font: 1em/1.5 sans-serif;
	transition:
		background-color var(--trans-dur),
		color var(--trans-dur);
}
body {
	background-color: var(--bg);
	display: flex;
	height: 100vh;
}
.switch,
.switch__input {
	-webkit-tap-highlight-color: transparent;
}
.switch {
	display: flex;
	align-items: center;
	margin: auto;
}
.switch__input {
	background-color: var(--unchecked);
	border-radius: 0.75em;
	box-shadow: 0 0 0 0.125em var(--primary-t);
	outline: transparent;
	position: relative;
	width: 2.25em;
	height: 1.5em;
	transition:
		background-color var(--trans-dur) var(--trans-timing1),
		box-shadow 0.15s var(--trans-timing1),
		transform var(--trans-dur) var(--trans-timing2);
	-webkit-appearance: none;
	appearance: none;
}
.switch__input:focus-visible {
	box-shadow: 0 0 0 0.125em var(--primary);
}
.switch__input:before {
	background-color: var(--bg);
	border-radius: 50%;
	content: "";
	display: block;
	position: absolute;
	top: 0.25em;
	left: 0.25em;
	transition:
		background-color var(--trans-dur),
		transform var(--trans-dur) var(--trans-timing2);
	width: 1em;
	height: 1em;
}
.switch__letters,
.switch__letter {
	transition: transform var(--trans-dur) var(--trans-timing2);
}
.switch__letters {
	margin-left: 0.375em;
	overflow: visible;
	pointer-events: none;
	width: 1.5em;
	height: 1.5em;
}
.switch__letter:last-child {
	transform: translateX(14px);
}
.switch__letter-stroke {
	stroke: var(--unchecked);
	transition:
		stroke var(--trans-dur) var(--trans-timing1),	
		stroke-dashoffset var(--trans-dur) var(--trans-timing2),
		transform var(--trans-dur) var(--trans-timing2);
}
.switch__letter-stroke:nth-child(2) {
	transform-origin: 2px 2px;
}
.switch__text {
	overflow: hidden;
	position: absolute;
	width: 1px;
	height: 1px;
}

/* “on” state */
.switch__input:checked {
	background-color: var(--checked);
}
.switch__input:checked,
.switch__input:checked + .switch__letters {
	transform: translateX(0.375em);
}
.switch__input:checked:before {
	transform: translateX(0.75em);
}
.switch__input:checked ~ .switch__letters .switch__letter-stroke {
	stroke: var(--checked);
}
.switch__input:checked ~ .switch__letters .switch__letter-stroke:nth-child(2) {
	stroke-dashoffset: 6;
}
.switch__input:checked ~ .switch__letters .switch__letter-stroke:last-child {
	stroke-dashoffset: 4;
}
.switch__input:checked ~ .switch__letters .switch__letter:first-child .switch__letter-stroke:nth-child(2) {
	stroke-dashoffset: 0;
	transform: rotate(56.5deg);
}
.switch__input:checked ~ .switch__letters .switch__letter:last-child {
	stroke-dashoffset: 0;
	transform: translateX(8px);
}

/* Dark theme */
@media (prefers-color-scheme: dark) {
	:root {
		--bg: hsl(var(--hue),10%,10%);
		--fg: hsl(var(--hue),10%,90%);
		--primary: hsl(var(--hue),90%,60%);
		--primary-t: hsla(var(--hue),90%,60%,0);
		--unchecked: hsl(var(--hue),10%,30%);
		--checked: hsl(133,70%,50%);
	}
}
    </style>
</head>
<body>
    <label class="switch">
        <input class="switch__input" type="checkbox" role="switch">
        <svg class="switch__letters" viewBox="0 0 24 24" width="24px" height="24px" aria-hidden="true">
            <g stroke="currentcolor" stroke-linecap="round" stroke-width="4" transform="translate(0,4)">
                <g class="switch__letter">
                    <polyline class="switch__letter-stroke" points="2 2,2 14" />
                    <polyline class="switch__letter-stroke" points="2 2,16 2" stroke-dasharray="14 16" stroke-dashoffset="8" transform="rotate(0,2,2)" />
                    <polyline class="switch__letter-stroke" points="2 8,6 8" stroke-dasharray="4 6" />
                </g>
                <g class="switch__letter" transform="translate(14,0)">
                    <polyline class="switch__letter-stroke" points="2 2,2 14" />
                    <polyline class="switch__letter-stroke" points="2 2,8 2" stroke-dasharray="6 8" />
                    <polyline class="switch__letter-stroke" points="2 8,6 8" stroke-dasharray="4 6" />
                </g>
            </g>
        </svg>
        <span class="switch__text">Power</span>
    </label>
</body>
</html>
